Description of problem:
Provisioning PPC64 machines with RHEL 4.* fails with the following error on boot:

DEFAULT CATCH!, exception-handler=fff00700
at   %SRR0: 0000000004080000   %SRR1: 0000000000023002
Open Firmware exception handler entered from non-OF code

Version-Release number of selected component (if applicable):
0.9.0, 0.9.1

How reproducible:
Always

Steps to Reproduce:
1. Attempt to provision RHEL 4.* on a PPC64 host.
2. Click on "Distro" used in the Beaker job, and view the tree.
3. iSeries kernel is in place where the PPC64 kernel should be. This kernel fails to boot. (RHEL-4/U8/AS/ppc/tree/ppc/iSeries/ on all lab controllers)
  
Actual results:
Fails when attempting to boot kernel image.

Expected results:


Additional info:
Beaker is using the wrong kernel for PPC64 installs of RHEL 4. This is affecting all PPC64 machines since the 0.9 upgrade.